A rotary lifting sling for aerated concrete blanks

Abstract

This invention discloses a rotary lifting device for aerated concrete billets, comprising a lifting beam with vertical movable beams at both ends. A fixed seat is located on the outer side of the movable beam, and a lifting hydraulic cylinder is mounted on the fixed seat. The push rod of the lifting hydraulic cylinder is connected to the upper end of the movable beam. Both the upper and lower sections of the movable beam are connected to the fixed seat via symmetrically arranged sliding limit components. The two movable beams achieve synchronous lifting and lowering through a rack and pinion synchronous structure. An even number of rotatable lifting lugs are provided on the lower surface of the lifting beam. Each set of lugs includes an active rotating lug and a driven rotating lug. A reversing cylinder drives the main shaft to rotate and retract the lugs. This invention effectively clamps the concrete billet and, through the sliding limit components and synchronous structure, completely solves the problems of asynchronous movement, shaking, and swaying, significantly improving lifting stability and operational safety.

Description

Technical Field

[0001] This invention relates to a rotary lifting device for aerated concrete blanks. Background Technology

[0002] In the production of precast concrete billets, steam curing is a core process to ensure the strength of the components meets standards and to shorten the production cycle. During operation, the concrete to be cured needs to be transferred to the steam curing device using hoisting clamps. Dedicated hoisting clamps are required for loading and unloading before and after steam curing.

[0003] There is a fixed maximum clamping space between the steam curing device and the part to be clamped. This space is determined by the inner diameter of the steam curing device and the maximum width of the part to be clamped. The clamping mechanism of the existing hoisting fixture cannot be retracted or adjusted. It can only be adapted to the operation requirements of the fixture by increasing the inner diameter of the steam curing device. However, increasing the inner diameter of the steam curing device will lead to an exponential increase in steam curing energy consumption, which not only does not meet the industrial requirements of energy conservation and emission reduction, but also significantly increases production costs. If the width of the part to be clamped is reduced to adapt to the existing fixture, it will severely limit the diversified design of product specifications.

[0004] Meanwhile, existing hoisting clamps generally suffer from asynchronous movement of the lifting mechanisms on both sides and significant shaking and swaying during operation. This not only affects clamping accuracy and work efficiency but also poses a safety hazard of component detachment, making it difficult to meet the needs of large-scale and efficient precast concrete production. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a rotary lifting device for aerated concrete blanks. Through an innovative rotatable lifting lug structure, it adapts to narrow clamping spaces, solves the problem of excessive energy consumption in the steam curing process, and at the same time achieves synchronous and stable operation of the clamp, thereby improving the overall performance of the lifting operation.

[0006] A rotary lifting device for aerated concrete blanks includes a lifting beam, with vertical movable beams at both ends of the lifting beam. A fixed seat is provided on the outer side of the movable beam, and a lifting hydraulic cylinder is provided on each fixed seat. The cylinder body of the lifting hydraulic cylinder is connected to the fixed seat, the push rod of the lifting hydraulic cylinder is connected to the upper end of the movable beam, and the lower end of the movable beam is connected to the end of the lifting beam.

[0007] The upper and lower sections of the movable beam are both connected to the fixed base through symmetrically arranged sliding limiting components;

[0008] The two movable beams are connected by a synchronous structure;

[0009] The lower surface of the lifting beam is provided with an even number of rotatable lugs. The lugs are arranged in pairs, and each pair of lugs includes an active rotating lug and a passive rotating lug. The head of each lug is provided with a rotating sleeve, the middle of the lug passes through the lug fixing seat, and the tail of the lug is an L-shaped suspension mechanism. The end of the lug fixing seat is connected to the lifting beam, and the middle of the lug fixing seat is provided with a through hole, allowing the lug to rotate within the through hole of the lug fixing seat.

[0010] The rotating sleeve of the active rotating lug is provided with a left connecting lug and a right connecting lug. The right connecting lug is connected to the main rotating shaft, and the left connecting lug is connected to the slave rotating shaft.

[0011] The rotating sleeve of the driven rotating lug is only provided with a left connecting lug, which is connected to the driven rotating shaft;

[0012] The active rotating lug and the driven rotating lug in the same group are connected by a main rotating shaft. The main rotating shaft passes through several right connecting lugs in sequence and is connected to the output end of the reversing cylinder through the main hinge.

[0013] Preferably, the sliding limit assembly includes a mounting plate, an L-shaped bracket, a side fixing block, an adjusting bolt, a pulley, a slider, and a main shaft;

[0014] The mounting plate is fixed to the surface of the movable beam. Two L-shaped brackets are connected to the mounting plate, which are arranged symmetrically at the top and bottom. The heads of the two L-shaped brackets are connected to the side fixing blocks. There are two side fixing blocks.

[0015] Both sides of the fixed block have a sliding groove at their ends, and the slider can slide in the sliding groove. The two sliders are connected by a main shaft, on which a pulley is sleeved. The outer wall of the fixed base is provided with a slide rail that matches the pulley. The head of the adjusting bolt is connected to the slider, and the adjusting bolt is screwed onto the side fixed block by a thread.

[0016] This component can provide vertical sliding guidance and lateral limiting constraint for the movable beam. The assembly gap between the slider and the pulley can be finely adjusted by adjusting the bolts to ensure that the pulley and the slide rail roll tightly together, effectively avoiding the problems of deviation, jamming and shaking during the lifting and lowering of the movable beam, and improving the overall smoothness of operation.

[0017] Preferably, two sliding limit components constitute a clamping mechanism, and the two sliding limit components in the same group are symmetrically distributed on both sides of the fixed seat to clamp the fixed seat.

[0018] With its symmetrical double-sided clamping layout, the fixed seat can be limited and guided from both sides simultaneously, further suppressing the lateral sway of the moving beam during operation and making the lifting motion more regular and stable.

[0019] Preferably, the synchronization structure includes a rack fixed inside the fixed base and a synchronization gear meshing with the rack, with the two synchronization gears connected by a transmission structure. By relying on the meshing transmission between the rack and the synchronization gear, the lifting and lowering movements of the two movable beams can be mechanically linked and constrained, achieving synchronous matching of the movement stroke and lifting rate, thus avoiding situations where asynchronous operation at both ends causes the suspended beam to tilt or experience uneven force.

[0020] Preferably, the transmission structure includes a synchronous shaft connected to the rotation center of the synchronous gears, and a transmission seat for connecting the two synchronous shafts. The synchronous shafts and the transmission seat form a rigid transmission link, which can smoothly transmit torque and displacement, ensure that the rotation pace of the synchronous gears on both sides is completely consistent, and enhance the reliability and transmission accuracy of the overall synchronous transmission.

[0021] Preferably, the number of lifting lugs is four. The four sets of lifting lugs are symmetrically arranged, which can support the aerated concrete billet component evenly from multiple points, resulting in uniform force distribution, good clamping stability, and meeting the stable lifting and bearing requirements of conventional aerated concrete billets.

[0022] Preferably, when the push rod of the reversing cylinder extends, it drives the rotating sleeve on the active rotating lug to rotate clockwise via the main rotating shaft, thereby driving the corresponding active rotating lug to rotate clockwise. At the same time, it pulls the corresponding driven rotating lug to rotate counterclockwise via the rotating shaft, causing the suspension mechanism at the bottom of the lug to retract into the lifting clamp. When the push rod of the reversing cylinder retracts, the lug rotates in the opposite direction and extends, completing the clamping of the component to be clamped.

[0023] Beneficial effects:

[0024] This solution, through the design of a master-slave cooperative rotating lifting lug structure, enables the rapid storage and deployment of the clamping mechanism. It can adapt to the narrow clamping space between the steam curing device and the aerated concrete billet, and can complete the lifting operation without increasing the inner diameter of the steam curing device. This can significantly reduce the energy consumption of the steam curing process, and at the same time, it does not restrict the size of the parts to be clamped.

[0025] Meanwhile, in conjunction with the rack and pinion synchronous structure and the upper and lower symmetrical sliding limit components, forced synchronous lifting and lowering of both sides of the clamp and smooth guidance throughout the process are achieved, which effectively improves clamping accuracy and work efficiency, eliminates safety hazards during the hoisting process, and the overall structure is simple and compact, easy to maintain, and can be well adapted to the large-scale operation needs of precast component production sites. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a rotary lifting device for aerated concrete blanks;

[0027] Figure 2 This is a top view of a rotary lifting device for aerated concrete blanks;

[0028] Figure 3 yes Figure 2 A magnified view of a portion of the image;

[0029] Figure 4 This is a schematic diagram of the bottom structure of the special hoisting clamp for this type of aerated concrete billet;

[0030] Figure 5 yes Figure 4 A magnified view of part A in the middle;

[0031] Figure 6 yes Figure 4 A magnified view of part B in the middle section;

[0032] Figure 7 This is a schematic diagram of the sliding limit component;

[0033] Figure 8 This is a partial schematic diagram of the bottom hoisting reversing structure;

[0034] Figure 9 yes Figure 8 A magnified view of a portion of the image;

[0035] Figure 10 This is a schematic diagram after the reversal;

[0036] Figure 11 This is a schematic diagram of the clamping space operation;

[0037] In the diagram: 1. Lifting beam, 2. Lifting hydraulic cylinder, 3. Fixed seat, 4. Lifting lug, 5. Sliding limit assembly, 51. Mounting plate, 52. L-shaped bracket, 53. Side fixing block, 54. Adjusting bolt, 55. Pulley, 56. Slider, 57. Main shaft, 6. Reversing cylinder, 7. Synchronous gear, 8. Rack, 9. Synchronous shaft, 10. Rotating sleeve, 11. Right connecting lug, 12. Left connecting lug, 13. Main rotating shaft, 14. Slave rotating shaft, 15. Main hinge, 16. Component to be clamped. Detailed Implementation

[0038] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and accompanying drawings. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0039] Example 1: A rotary lifting device for aerated concrete blanks includes a lifting beam 1, with movable beams vertically welded to both ends of the lifting beam 1. The movable beams are made of rectangular steel pipes. A fixed seat 3 is provided on the outer side of the movable beam, and the fixed seat 3 is fixedly connected to the frame of an external lifting equipment by bolts.

[0040] A lifting hydraulic cylinder 2 is installed on the top of the fixed base 3. The cylinder body of the lifting hydraulic cylinder 2 is fixedly connected to the top surface of the fixed base 3. The push rod of the lifting hydraulic cylinder 2 extends downward and is fixedly connected to the upper end of the movable beam. The lower end of the movable beam is fixedly connected to the end of the lifting beam 1 to form an integral lifting frame.

[0041] Each of the upper and lower sections of the movable beam is equipped with a set of sliding limit assemblies. Each set of sliding limit assemblies includes two sliding limit components symmetrically distributed on both sides of the fixed base 3. The sliding limit assembly includes a mounting plate 51, an L-shaped bracket 52, a side fixing block 53, an adjusting bolt 54, a pulley 55, a slider 56, and a main shaft 57.

[0042] Mounting plate 51 is fixed to the outer surface of the movable beam by bolts. Two symmetrical L-shaped brackets 52 are welded onto mounting plate 51, and the heads of the two L-shaped brackets 52 are connected to side fixing blocks 53. Slide grooves are formed on the opposite end faces of the two side fixing blocks 53, and the shape of the slider 56 is adapted to the slide groove, allowing it to slide within the slide groove. The two sliders 56 are fixedly connected by a main shaft 57, and a nylon pulley 55 is fitted in the middle of the main shaft 57. A steel slide rail that mates with the pulley 55 is welded to the outer wall of the fixing seat 3.

[0043] The position of the slider 56 can be adjusted by adjusting bolt 54, thereby ensuring that the pulley 55 fits tightly with the slide rail and eliminating the shaking caused by gaps. Two symmetrical sliding limit components 5 clamp the fixed seat 3 from both sides, forming a two-way guide structure, which effectively limits the lateral swing of the movable beam.

[0044] A synchronization structure is provided between the two movable beams, comprising two racks 8, two synchronous gears 7, two synchronous shafts, and a transmission base. The two racks 8 are vertically welded to the inner walls of the two fixed bases 3, and the two synchronous gears 7 mesh with the two racks 8 respectively. The center holes of the synchronous gears 7 are connected to one end of the synchronous shafts via flat keys, and the other ends of the two synchronous shafts are connected by couplings within the transmission bases, forming a rigid transmission chain. When one movable beam rises or falls, the racks 8 drive the synchronous gears 7 to rotate, and the motion is then transmitted to the synchronous gears 7 on the other side via the synchronous shafts, thus ensuring that the rising and falling speeds of the two movable beams are completely synchronized.

[0045] Four lifting lug fixing seats are bolted to the lower surface of the lifting beam 1. Each lifting lug fixing seat has a circular through hole in the middle. The lifting lug 4 passes through the through hole and can rotate freely in the hole. The head of the lifting lug 4 is welded with a rotating sleeve 10, and the tail is bent into an L shape to form a suspension mechanism for supporting the aerated concrete billet.

[0046] The four lifting lugs are divided into two groups, each group containing one active rotating lifting lug and one passive rotating lifting lug. The active rotating lifting lug's rotating sleeve 10 has a left connecting lug 12 and a right connecting lug 11 welded to it. The right connecting lug 11 is hinged to the main rotating shaft 13 via a pin, and the left connecting lug 12 is hinged to the passive rotating shaft 14 via a pin. The passive rotating lifting lug's rotating sleeve 10 only has the left connecting lug 12 welded to it, and it is hinged to the passive rotating shaft 14 via a pin.

[0047] The main rotating shaft 13 is arranged along the length of the lifting beam 1, passing sequentially through the right connecting lugs 11 of the two sets of active rotating lifting lugs. One end of the main rotating shaft 13 is hinged to the output end of the reversing cylinder 6 via the main hinge part 15. The cylinder body of the reversing cylinder 6 is fixed to the upper surface of the lifting beam 1 by a bracket. The rotating shaft 14 is also arranged along the length of the lifting beam 1, connecting the active rotating lifting lug and the driven rotating lifting lug in the same group.

[0048] Usage process:

[0049] S1. Activate the reversing cylinder 6. Its push rod extends, pushing the main rotating shaft 13 forward. The main rotating shaft 13, through the right connecting lug 11, drives the rotating sleeve 10 of the active rotating lifting lug to rotate clockwise, causing the active rotating lifting lug to rotate clockwise. Simultaneously, the active rotating lifting lug, through the left connecting lug 12, pulls the rotating shaft 14 backward. The rotating shaft 14 drives the rotating sleeve 10 of the driven rotating lifting lug to rotate counterclockwise, causing the driven rotating lifting lug to rotate counterclockwise. At this time, the L-shaped suspension mechanisms of the four lifting lugs 4 are all retracted into the inner side of the lifting beam 1. The lateral dimension of the clamp is minimized, allowing it to extend into the bottom of the aerated concrete billet for clamping, preventing damage to the concrete billet.

[0050] S2. Move the hoisting clamp downwards after it has been stored, insert it into the bottom of the component 16 to be clamped, and clamp it to prevent damage to the concrete billet.

[0051] Until the lower surface of the lifting beam 1 is in contact with the upper surface of the component 16 to be clamped.

[0052] S3. Retract the push rod of the reversing cylinder 6, move the main rotating shaft 13 backward, causing the active rotating lug to rotate counterclockwise, and move the rotating shaft 14 forward, causing the driven rotating lug to rotate clockwise. The suspension mechanism of the four lugs 4 extends outward and is inserted into the reserved lifting slot at the bottom of the component to be clamped 16.

[0053] S4. Activate one of the lifting hydraulic cylinders 2 on both sides. Its push rod pushes the movable beam upward along the fixed seat 3. The movable beam drives the lifting beam 1 and the clamped component 16 to rise synchronously. During the lifting process, the pulley 55 of the sliding limit assembly 5 rolls along the slide rail of the fixed seat 3, guiding and limiting the movable beam. The synchronous structure, through the transmission of the rack 8 and the synchronous gear 7, ensures that the lifting height of the movable beams on both sides is completely consistent, preventing the lifting beam 1 from tilting.

[0054] S5. After hoisting the component 16 to be clamped to the designated position, restart the reversing cylinder 6 to retract the lifting lug 4, and then remove the clamp to complete one hoisting operation. For stable hoisting, two hoisting clamps can be used symmetrically and synchronously to maintain stable clamping of the workpiece.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rotary lifting device for aerated concrete blanks, characterized in that, Includes a lifting beam (1), both ends of which are provided with vertical movable beams, and a fixed seat (3) is provided on the outside of the movable beam. Each fixed seat (3) is provided with a lifting hydraulic cylinder (2). The cylinder body of the lifting hydraulic cylinder (2) is connected to the fixed seat (3), the push rod of the lifting hydraulic cylinder (2) is connected to the upper end of the movable beam, and the lower end of the movable beam is connected to the end of the lifting beam (1). The upper and lower sections of the movable beam are connected to the fixed base (3) through symmetrically arranged sliding limit components (5); The two movable beams are connected by a synchronous structure; The lower surface of the lifting beam (1) is provided with an even number of rotatable lifting lugs (4). The lifting lugs (4) are arranged in pairs, and each pair of lifting lugs (4) includes an active rotating lifting lug and a passive rotating lifting lug. The head of each lifting lug (4) is provided with a rotating sleeve (10). The middle part of the lifting lug (4) passes through the lifting lug fixing seat. The tail of the lifting lug (4) is a suspension mechanism with an L-shaped bend. The end of the lifting lug fixing seat is connected to the lifting beam (1). The middle part of the lifting lug fixing seat is provided with a through hole. The lifting lug (4) can rotate in the through hole of the lifting lug fixing seat. The rotating sleeve (10) of the active rotating lug is provided with a left connecting lug (12) and a right connecting lug (11). The right connecting lug (11) is connected to the main rotating shaft (13), and the left connecting lug (12) is connected to the slave rotating shaft (14). The rotating sleeve (10) of the driven rotating lug is provided with only a left connecting lug (12), which is connected to the driven rotating shaft (14); The active rotating lug and the driven rotating lug in the same group of lugs (4) are connected by a driven shaft (14). The main shaft (13) passes through several right connecting lugs (11) in sequence and is connected to the output end of the reversing cylinder (6) through the main hinge (15).

2. The rotary lifting device for aerated concrete blanks according to claim 1, characterized in that, The sliding limit assembly (5) includes a mounting plate (51), an L-shaped bracket (52), a side fixing block (53), an adjusting bolt (54), a pulley (55), a slider (56), and a main shaft (57); The mounting plate (51) is fixed on the surface of the movable beam. Two L-shaped brackets (52) are connected to the mounting plate (51) and are arranged symmetrically. The heads of the two L-shaped brackets (52) are connected to the side fixing blocks (53). There are two side fixing blocks (53). Both sides of the fixing blocks (53) are provided with grooves at their ends. The sliders (56) can slide in the grooves. The two sliders (56) are connected by a main shaft (57). A pulley (55) is sleeved on the main shaft (57). A slide rail matching the pulley (55) is provided on the outer wall of the fixing seat (3). The head of the adjusting bolt (54) is connected to the slider (56). The adjusting bolt (54) is screwed onto the side fixing blocks (53) by threads.

3. The rotary lifting device for aerated concrete blanks according to claim 2, characterized in that, Two sliding limit components (5) constitute a clamping mechanism. The two sliding limit components (5) in the same group are symmetrically distributed on both sides of the fixed seat (3) to clamp the fixed seat (3).

4. The rotary lifting device for aerated concrete blanks according to claim 1, characterized in that, The synchronization structure includes a rack (8) fixed inside the fixed base (3) and a synchronization gear (7) meshing with the rack (8). The two synchronization gears (7) are connected by a transmission structure.

5. The rotary lifting device for aerated concrete blanks according to claim 4, characterized in that, The transmission structure includes a synchronous shaft connected to the rotation center of the synchronous gear (7), and a transmission seat for connecting the two synchronous shafts.

6. The rotary lifting device for aerated concrete blanks according to claim 1, characterized in that, The number of lugs (4) is four.

7. The rotary lifting device for aerated concrete blanks according to claim 1, characterized in that, When the push rod of the reversing cylinder (6) extends, it drives the rotating sleeve (10) on the active rotating lug to rotate clockwise through the main rotating shaft (13), thereby driving the corresponding active rotating lug to rotate clockwise. At the same time, it pulls the corresponding driven rotating lug to rotate counterclockwise through the rotating shaft (14), so that the suspension mechanism at the bottom of the lug (4) is retracted to the inside of the lifting fixture. When the push rod of the reversing cylinder (6) retracts, the lug (4) rotates in the opposite direction and extends, completing the clamping of the component (16) to be clamped.

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